Malicious PDF — malware analysis report

Static analysis result for SHA-256 828ab6f0d5c0606b…

MALICIOUS

PDF

60.8 KB Created: 2020-10-22 04:20:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 47a77d49af7d736798e3ccf9e9952421 SHA-1: 7f28ebf70eff290667abf90095eb0954dca44291 SHA-256: 828ab6f0d5c0606b044f73f579ec72e20e5c188c9b384bdb47e56282e51cc693
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gettraff.ru/123?keyword=bmw+z4+coupe+manual+or+automatic In PDF document text
    • https://cdn-cms.f-static.net/uploads/4389127/normal_5f8ffd1bab3cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388276/normal_5f8f075f87832.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366040/normal_5f87068315723.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366660/normal_5f873bb3281ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365563/normal_5f87122a5052e.pdfIn PDF document text
    • https://vikumeniwexawud.weebly.com/uploads/1/3/0/9/130969440/saganan.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/4e0d994f.pdfIn PDF document text
    • https://texitanoz.weebly.com/uploads/1/3/0/7/130739996/nutokekelomalek.pdfIn PDF document text
    • https://wegotutitupal.weebly.com/uploads/1/3/1/4/131453182/nokokudusux_tixinab_basazurexutulog_fabuzuvofij.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/kadupe_ripovu_jozovagazemewe.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/xodawowalagivolodazo.pdfIn PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/44eb3f98510ed50.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/35d579ba-aa14-4e86-b7da-6d297cf56db6/38628240416.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36418a69-2dc6-42b5-9e77-a54f640bc090/95789350216.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/568b6b06-3ad6-459c-b5b6-f748dc200846/7677926101.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cff68b5-b99b-47de-b505-65b6584c7468/99194880835.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/4068/6239/files/gerund_infinitive_exercises_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/3050/9254/files/facetas_em_resina_composta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcd73736-55cd-400b-a489-bdafc7dc6bc8/tanikukuvikepe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f71fbefb-3bdd-47d5-991d-7c9437fddd5e/fugamalix.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000091a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91A4 5180 bytes
SHA-256: b1883cd188b4752ed05c4412b4feb7415d256cccf1acb514317f621a35a25620
font_01_sfnt_off0000a349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA349 14668 bytes
SHA-256: cf8f006118054edcce19599d1c325e0347fef645ba1016399ca632cbe486d5ad
font_02_sfnt_off0000d099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD099 16060 bytes
SHA-256: 713933360072c9d59346590fad668f98c3603c6d2b72ed941ce85481f6af0b74

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